Improvement in self-lubricating pulleys



W.W.CRANE.

Self-Lubricating Pulleys.

N0. 133,416 Patented Nov.26,1872.

Attorneys.

UNITED STATES PATENT OFFICE.

VVELLSLY W. CRANE, OF AUBURN, NEW YORK.

IMPROVEMENT IN SELF-LUBRICATING PULLEVS.

Specification forming part of Letters Patent No. 133,416, dated November26, 1872.

To all whom it may concern.-

Be it known that I, WELLsLY W. CRANE, of Auburn, in the county ofCayuga, and in the State of New York, have invented certain new new anduseful Improvements in Self-Lubricatconsists in casting the external andinternal hubs with the caps at the ends all in one piece,

. whereby the expense in the manufacture is materially reduced-in fact,so muchso that a pulley of this kind maybe made and sold at the same orvery near the same as an ordinary pulley.

In order to enable others skilled in the art to which my inventionappertains to make and 7 use the same, I will now proceed to describeitsconstruction and operation, referring to the annexed drawing, inwhich-the two figures represent sections of my improved self-lubrieatingpulley. Y

A represents the external and B the internal hub, connected by a seriesof arms 0 G,

' and the internal hub having one or more apertures, a, for the oil topass into the shaft from the oil-chamber, formed between the two hubs. DD represent the end pieces of the exterior hub A, corresponding with thecaps in my former patent, which caps were made separate and attached byscrews. In this case the whole hub with the caps or end pieces D Discast in one piece at one time. The ends of the-interior hub B as well asthe inner edges of the caps or end pieces D-D are feathered or beveled,for the purpose of preventing the oil from escaping around the shaft.The outer surfaces of the caps or end pieces D D are raised in thecenter around the aperture for the shaft, so as to present as littlesurface as possible for friction. By castin g the entire hub in thismanner in one piece the cost of manufacturing the same is verymaterially reduced, and the hub can be made and sold at the same orabout the same price as an ordinary pulley.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

The external hub or pulley A D with the internal hub B and arms G 0,made completein one casting, substantially as herein set forth.

In testimony that I claim theforegoing I have hereunto set my hand this30th day of October, 1872.

WELLSLY W. CRANE. A. N. MARR, EDM. F. BROWN.

